Never mind, now I know what "dog ear" also means. Although I'm also guilty of doing that as well with text books.
Im gonna put these unneeded hands on you if i catch you dog earing aadar, and i might put them on Shiriu too if he doesnt stop doing it
I don't do that anymore now though since I out grew that a long time ago(I should've wrote what I did before in past tense).